NBS Source
Knauf Insulation OmniFit® Slab 35

Knauf Insulation OmniFit® Slab 35

Knauf Insulation Ltd Third party certifications:
  • QA Certificate

    QA Certificate

    Certificate type

Non-combustible glass mineral wool slabs for use in both timber and steel frame construction projects.

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+44 (0)1744 766 666 www.knaufinsulation.co.uk


  • Pitched roofs - rafter level.
  • Timber frame walls - built in.
  • Internal walls.
  • Light steel frame walls.
  • Internal floors.
  • Separating floors - timber.
  • Suspended timber ground floors.


OmniFit® Slab 35 is a Glass Mineral Wool slab, designed for use in multiple applications in both timber and steel frame construction, that offers excellent thermal and acoustic performance.

It is non-combustible insulation with the best possible Euroclass A1 reaction to fire classification, and is manufactured using Knauf Insulation's unique bio-based binder, ECOSE® Technology.

Features and benefits:

  • Good thermal performance.
  • Provides a higher level of thermal performance than alternative flexible slabs.
  • Manufactured with ECOSE® technology, an innovative, bio-based binder that helps make the product soft and easy to handle.
  • Non-combustible A1 Euroclass Reaction to Fire classification.
  • Good sound absorption characteristics.
  • Multi-purpose product which can be used to insulate a wide range of applications, meaning less products on a vehicle and on-site.
  • Manufactured size allows friction fitting between common stud centres without any cutting and waste on-site

General information






Glass mineral wool

Glass mineral wool.




1200 x 400 mm

Uniclass 2015

Pr_25_57_06_53 Mineral wool insulationPrimary


B15/110 Timber-framed

B15/120 Timber-framed

B15/130 Light gauge steel frame

B15/140 Precast concrete frame

C46/370 Making good of cavity wall insulation

E20/200 Proprietary underslab insulation

F30/10 Full fill cavity insulation

F30/150 Full fill cavity insulation

H11/780 Thermal insulation

H42/482 Thermal insulation to rear of panels

H43/120 Metal insulating sandwich panel

H61/230 Mineral wool insulation on structural metal liner trays

H62/230 Mineral wool insulation on structural metal liner trays

H64/305 Mineral wool insulation on structural metal liner trays

H65/230 Mineral wool insulation on structural metal liner trays

H67/305 Mineral wool insulation on structural metal liner trays

H92/775 Thermal insulation

H92/776 Thermal insulation

K10/115 Metal stud partition system

K10/155 Wall lining system (metal studs)

K10/165 Wall lining system (metal framing)

K10/30 Metal stud

K10/35 Wall lining system (metal framing)

K11/115 Battened plywood floating floor

K11/125 Battened particleboard floating floor

K11/135 Battened oriented strand board floating floor

K11/145 Battened cement-bonded particleboard floating floor

K11/20 Battened particleboard floating floor

K11/215 Plywood floating floor

K11/225 Particleboard floating floor

K11/235 Oriented strand board floating floor

K11/245 Cement bonded particleboard floating floor

K11/25 Particleboard floating floor

K11/275 Acoustic separating floor system

K11/35 Oriented strand board flooring

K11/795 Wall lining on metal framing

K11/796 Metal stud partition system

M10/290 Floating construction

P10/125 Insulation laid between ceiling ties/ joists

P10/135 Insulation laid across ceiling ties/ joists

P10/140 Insulation fitted between rafters

P10/148 Multilayer blanket insulation fixed under or above rafters

P10/15 Insulation fitted between rafters

P10/180 Insulation to water cisterns

P10/190 Insulation fitted between studs

P10/212 Insulation fixed across inner face of stud walling

P10/217 Insulation slabs fixed to backing wall

P10/220 Sound insulation within timber framed separating wall

P10/240 Insulation fitted between floor joists

P10/25 Insulation to water cisterns

P10/40 Insulation fitted betweenor to the face ofstuds

Specification data - Mineral wool insulation Enhanced data


To BS EN 13162.





Thickness (minimum)

50 mm.

100 mm.

140 mm.

Width (nominal)

400 mm.

Thermal conductivity (maximum)

0.035 W/mK.

Fire performance

EUROCLASS A1 to BS EN 13501-1.

Recycled content


Environmental information

Contains Red List materials


Country of material origin

United Kingdom


See Product EPD.


Recycled content


Digital objects

Platform Compatible Version Certified to




Download now from NBS National BIM Library

Third party certifications

  • Eurofins Gold Certificate for Indoor Air Comfort

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